Think of and look at your work as though it were done by your enemy. I you look at it to admire it, you are lost.

Be virtuous and you will be vicious.

Life is one long process of getting tired.

The oldest books are only just out to those who have not read them.

Don't learn to do, but learn in doing.

One of the first businesses of a sensible man is to know when he is beaten, and to leave off fighting at once.

The man who lets himself be bored is even more contemptible than the bore.